What's your estimated velocity with that load? I know your penchant for loading hot and lead bullets don't do good at 1200+ fps no mater what kind of coating they have. I can hit at 1200 with my 44 mag cast lead bullets but not much more. Those are cast with straight wheel weight lead and the have gas checks. The gas checks are what let me get away with the 1200 fps, it damn sure isn't the tire weight alloy!
I checked out his website, I think I just found my new source for cast bullets! Thanks Mike!